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@ -1,4 +1,4 @@
# LittleV Graphics Libraray
# Littlev Graphics Libraray
![LittlevGL cover](http://www.gl.littlev.hu/home/main_cover_small.png)
@ -86,12 +86,16 @@ bool my_input_read(lv_indev_data_t *data) {
data->point.x = touchpad_x;
data->point.y = touchpad_y;
data->state = LV_INDEV_EVENT_PR or LV_INDEV_EVENT_REL;
return false; /*No buffering so no more data read*/
```
#### Keypad or keyboard
`
indev_drv.type = LV_INDEV_TYPE_KEYPAD;
indev_drv.read_fp = my_input_read;
`
The read function should look like this:
```c
bool keyboard_read(lv_indev_data_t *data) {
@ -107,15 +111,21 @@ bool keyboard_read(lv_indev_data_t *data) {
}
```
To use a keyboard:
* `LV_OBJ_GROUP` has to be enabled in lv_conf.h
* An object goup has to be craeted: `lv_group_create()` and object has to be added: `lv_group_add_obj()`
* The create group has to be assigned to the input device: `lv_indev_set_group(my_indev, group1);`
* Use `LV_GROUP_KEY_...` to navigate among the objects in the group
## Project set-up
1. Clone or download the lvgl repository: `git clone https://github.com/littlevgl/lvgl.git`
2. Create project with your prefered IDE and add the lvgl folder
3. Copy *lvgl/lv_conf_templ.h* as **lv_conf.h** next to the lvgl folder
3. Copy *lvgl/lv_conf_templ.h* as *lv_conf.h* next to the lvgl folder
4. In the *_conf.h files delete the first `#if 0` and its `#endif`. Let the default configurations at first.
5. In your *main.c*: #include "lvgl/lvgl.h"
6. In your *main function*:
* lvgl_init();
* tick, display and input device initialization (se above)
* tick, display and input device initialization (see above)
10. To **test** create a label: `lv_obj_t * label = lv_label_create(lv_scr_act(), NULL);`
11. In the main *while(1)* call `lv_task_handler();` and make a few milliseconds delay (e.g. `my_delay_ms(5);`)
12. Compile the code and load it to your embedded hardware